Rivet sticker



June 22, 1943. o. MUELLER RIVET STICKER Filed June 22, 1939 4Sheets-'Shet 1 IN VENTOR 02 3 0 MaeZ/en M NE Y5.

June 22, 1943. o. MUELLER RIVET STICKER Filed June 22, 1959 4Shets-Sheet 2 Q 11v VENTOR BY 052 0 Mae/Z1 O. MUELLER RIVET STICKER June22, 1943.

Filed June 22, 1939 4 Shets-Sheet 3 INVENTOR BY 02 /0 Mei/er:

: 1 romva a June 22, 1943. o. MUELLER RIVET STICKER '-4 Sheets-Sheet 4Filed June 22, 1939 fa 66 /8 IN VENTOR 0 2 50 Mueller:

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Patented June 2.2, 1943 UNITED STATES PATENT OFFICE Murray Corporationof America,

Detroit, Mich,

a corporation of Delaware Application June 22, 1939, Serial No. 280,670

3 Claims.

My invention relates to rivet devices, and particularly to a device forsorting and delivering a rivet to a position to be stuck and swaged.

The present invention embodies a rivet sorter, the head of which isrotated to have the rivets selectively suspended by their heads in adelivery trough. The sorting head is rotated by a. cylinder actuated inreciprocation to drive a rack and pinion, the latter of which, operatingthrough over-running clutches, alternately drives a pair of gears. Onegear drives the shaft supporting the rotor directly, while the otherdrives the shaft through an idler gear, and the sorting head is therebyintermittently advanced in a counterclockwise direction. Beneath thetrough in which the rivets are suspended by their heads, an advanceablearm is mounted in a sleeve and a slot and roller connection is providedtherebetween, such as to cause the arm to turn through 180 degreesduring its advancement to rivet sticking position. The arm is providedwith a cam surface which operates during its advancement, and a selectorwhich disengages a rivet from the group suspended in the collectingtrough to permit a single rivet to advance to the end of the trough eachtime the arm is advanced. A rivet holding head is mounted above the armat the end of the trough, in position to receive the single rivetreleased 'by the selector. The head is also aligned with a pair ofspring pressed pivoted fingers on the end of the arm having a hole inwhich the rivet is placed by the head when actuated downwardly by apiston within the cylinder. The fingers function as jaws to be opened bythe rivet when forced in the aperture thereof and to support the rivetwhen released by the holding head. The entire mechanism is actuated by a'fluid introduced into one or the other end of the cylinders torelatively move the piston and cylinder longitudinally.

Accordingly, the main objects of my invention are; to provide a rivetselecting and placingdevice which is operated by a plurality of fluidactuated pistons and cylinders; to provide a rotor for selecting therivets and assembling them in a trough which is actuated 'by a cylinderfor unidirectionally advancing the rotor; toprovide an arm for advancingthe rivet to sticking posi tion which operates a selector for releasinga single rivet from the trough; to. provide a rivet holding head at the.end ofthe trough for receiving and holding the rivet and advancing therivet into the jaws on the rivet sticking arm; .andin. general, toprovide means for selecting therivets, placing a single rivet at a timein jaws, and advancing and rotating the jaws through 180 degrees to aposition adjacent the elements to be riveted, all 'of which is simple inconstruction, positive in operation, and economical of manufacture.

Other objects and features of novelty of my invention will be eitherspecifically pointed out or will become apparent when referring, for abetter understanding of my invention, to the following description takenin conjunction with the accompanying drawings, wherein:

Figure l is a side view, in elevation, of a rivet selector and stickingdevice embodying features of my invention;

Fig. 2 is an enlarged sectional view of the structure illustrated inFig. 1, taken on the line 2-2 thereof;

Fig. 3 is an enlarged sectional view of structure illustrated in Fig. 1,taken on the line 3--3 thereof;

Fig. 4 is an enlarged broken view in section of the device illustratedin Fig. 1, showing the rivet advancing arm in retracted position;

Fig. 5 is a sectional view of the structure illustrated in Fig. 6, takenon the line 5-5 thereof;

Fig. 6 is a sectional view of the structure illustrated in Fig. 3, takenon the line 6-5 thereof;

Fig. '7 is a sectional view of the structure illustrated in Fig. 6,taken on the line ll thereof;

Fig. 8 is a sectional view of the structure illustrated in Fig. 6, takenon the line 88 thereof;

Fig. 9 is a sectional view of the structure illustrated in Fig. 6, takenon the line 9--9 thereof;

Fig. 10 is an enlarged view of structure, similar to that illustrated inFigs. 1 and l, after the rivet has been advanced by the rivet stickingarm;

Fig. 11 is a sectional view of the structure illustrated in Fig. 10,taken on the line ll--l| thereof;

Fig. 12 is a sectional view of the structure illustrated in Fig. 10,taken on the line l2-i?. thereof; and,

Fig. 13 is a sectional view of the structure illustrated in Fig. 12,taken on the line 'l3-l3 thereof.

In Fig. 1, I have illustrated the rivet sticking device as embodying arivet selector it, a receiving head it, and a trough in which the rivetsare headsa's illustrated more clearly in Fig. 6. When the trough isfull, the rivets pass over the end and as they are delivered from theopposite end, additional rivets will be guided by the end by the leafspring into the slot 26 of the trough. The rotor 23 is mounted on ashaft 27 and is journaled in a bearing 28 in the casting 29. The bearing28 is secured in the split hub 3| of the casting by pins 32, and thebolt 34. A splined sleeve is mounted on the shaft 27 and is keyed to thehub of the rotor 23 by key 36. The sleeve is splined and carries a gearunit 3'! thereon having gear teeth 38 and 39 on the outer periphery bywhich the sleeve 35 and therefore the hub of the rotor 23 is drivenfirst through one set of gear teeth and then through the other. Keys 4!lock the gear unit 37 to the sleeve 35 in the splines provided therein.

The driving mechanism embodies a fixed shaft 42 having mounted thereon apiston over which a cylinder 43 operates in reciprocation. Fluid isintroduced into the cylinder through the hollow shaft 42 illustrated inFig. 6 to one or the other side of the piston to cause the cylinder toreciprocate on the shaft. A pin 44 projects from the top of the cylinderand operates in a slot 45 in a housing 46 surrounding the mechanism, toprevent the cylinder from turning on the shaft. The cylinder has a rack4'! secured to the underside which operates a gear 48 in rotation. Ashaft 43 carries a pair of gears 5i and 52 for independent rotationthereon. The gears 5| and 52 are provided with shoulders 53 on which thegear 48 rotates and on a friction washer 54 mounted between theshoulders. Over-running clutches 55 and 56 interconnect the gear 46alternately to the gears 5i and 52 as the cylinder reciprocates.

It will be noted from Figs. 8 and 9 that the clutches are mounted tobecome effective in different directions of operation so that when thecylinder 43 is advanced to the right as illustrated in Fig. 7 the gear48 moves in a clockwise direction and drives the gear 5! along therewithwhile releasing the gear 52. Upon the reversal of the flow of fiuidwithin the cylinder thereafter, the cylinder will be advanced to theleft releasing the gear 5| and engaging and driving the gear 52. In thismanner through the movement of the cylinder in one or the otherdirections, the gears 5| and 52 will be rotated alternately in aclockwise or counterclockwise direction.

The gear 52 has the teeth thereof meshing with the teeth 36 of the gearunit 37 so that as the gear 52 is driven the rotor 23 will be driven ina counterclockwise direction.

of which are in mesh with the teeth 39 of the gear unit 37. Upon thereverse movement of the cylinder 43, that is to the left, as viewed inFig. '7, the gear 55 is driven in counterclockwise direction while gears51 and 58 are driven in clockwise direction which drives the gear unit31 in a counterclockwise direction. This continues the movement of therotor in a counterclockwise direction previously produced by theoperation of the gear 52 as the cylinder 43 moves to the right.

It will be apparent, therefore, that continued reciprocation of thecylinder as intermittently advances the rotor 23 in counterclockwisedirection to have the rivets retained by the slot 22, advanced to theend of the trough 24 where they will drop into the slot 26 of thetrough, over the end thereof if the trough is filled with rivets. Themechanism just described for operating the The gear 5i meshes with agear 5'! which drives a gear 58 the teeth rotor is that illustrated anddescribed and claimed in my United States Patent No. 2,108,991, issuedFebruary 22, 1938, and will not be described further herein.

The rivets delivered to the trough 24 pass along the slot 26 thereofuntil the advancement is interrupted by the finger 6| on the end of theselector l9. The selector l9 comprises a pair of arms 62 and 63projecting from a hub 64 which is secured on a pivot 65 for arcuatemovement. The arm 63 carries the fingers 6| while the arm 62 is providedwith a stop finger 66. A cam arm 6'! is mounted on the hub 64 projectingthrough an aperture 68 of a sleeve 69. The sleeve 69 is supported in apair of brackets H on a base 12 and is provided with a helical slot 73in its wall-for a purpose which will be explained hereinafter.

A piston rod 14 has a pair of fluid passageways T5 and 16 therethroughas illustrated in Fig. 12. The piston rod carries a piston 11 thereondisposed within a cylinder 18 provided on the rear end of the rivetadvancing plunger 79. A suitable packing gland 8| is provided on the endof the cylinder to form a seal with the piston rod 74. A pair of tubularconnectors 82 on the piston rod provide means for connecting fluidcircuits to the rod whereby fluid is introduced into one or the other ofthe passageways I5 and 16 thereof as illustrated in Fig. 12.

' The end of the piston rod is threaded at 83 and is adjustably securedby nuts 84 to a web 85 on the base 12. The end of the plunger 19 isenlarged to provide a bearing fit with the inner surface of the sleeve69. A cam surface 86 is formed between the enlarged end of the plunger19 and wall of the cylinder 18 which operates the cam arm 61 on therivet selector l9 to have the fingers 6| and 66 move once across theslot 26 of the trough 24 to permit a single rivet to drop between thefingers 6| and 66 each time the arm is actuated. In this manner a singlerivet is delivered to the holding head l6 at each operation of thedevice.

A head 81 is mounted on the end of the plunger 19 and is provided with aslot 88 in which a pair of clamping jaws 89 are mounted on a pivot 9|. Aspring-pressed plunger 92 engages the rear wall of the jaws to bias themtogether about a rivet. The ends of the jaws are provided with alignedsemi-cylindrical notches which form an aperture 93 when the jaws aredisposed in abutting relation. The aperture thus formed has a chamferedend 94 which aids in guiding the rivets into the opening 93 and servesas a cam'for opening the jaws when the rivet is forced therethrough. Theplunger I9 has a roller 95 on its wall secured by a pin 96. The rolleris disposed in the slot 13 and produces the rotation of the plunger 19,head 88, and jaws 89, as well as the cylinder l8 when the cylinder isreciprocated over the piston 11 through the admission of fluid eitherside of the piston. Through the adjustment of the nuts 84, theadvancement of the jaws 89 relative to a workpiece is Very accurate lyregulated.

The rivet holding head l6 embodies a supporting bracket 98 extendingfrom the forward bracket H on the base 12. A cylinder 99 is supported bythe bracket 98 having a plunger l0! projecting from the lower endthereof and actuated by a piston within the cylinder. The lower end ofthe bracket 98 is provided with a hub I02 through which the plunger IOIextends. Within the hub a rivet receiving and supporting cylin der I03is provided having shoulders I04 thereon which limit the downwardmovement of the cylinder when engaging an end cap I on the end of thehub I02. The cylinder I03 is biased downwardly by a spring I06 mountedwithin the hub. A pair of fingers I01 are mounted in slots in thecylinder I 03 having projecting end p rtions I08 which engage theunderside of the rivet head which has been advanced through a slot I09in the wall of the cylinder. A garter spring III is secured on the outerwall of the fingers I01 for biasing them inwardly toward the cylinderaxis.

A cam surface H2 is provided on each finger which is engaged by anenlarged end II3 of the plunger IOI for moving the fingers outwardly andforces the rivet, which is thereby released through the aperture 93 ofthe jaws 89, as illustrated in Fig. 11. The enlarged end Il3 operates inthe enlarged aperture H4 in the lower portion of the cylinder I03,providing a shoulder II5 against which the end II3 abuts to raise thecylinder against tension of the spring I06 during the upward movement ofthe plunger IOI within the cylinder 99, The cylinder I03 is providedwith a key I H which operates in a slot in the end cap I05 to preventthe cylinder I03 from turning relative t the hub I02. A bearing H8 isprovided in the upper end of the hub for guiding the plunger when movedinto or from the cylinder 99.

The operation of the device will now be described. Fluid is firstintroduced through the piston rod 14 to advance plunger I9 and,therefore, the jaws 89 into position to have the rivet held therebyrevolve through 180 degrees and disposed aligned with the aperture ofthe workpiece to be riveted, as illustrated in Fig. 1. After the rivethas been moved from the jaws 89 through the advancement of a rivetingplunger, the plunger I9 and the jaws are returned to their originalposition. This movement of the cam surface 86 in reciprocation, operatesthe cam arm 61 and the selector I9 to permit a single rivet to bedelivered along the trough 24, The rivet advances in the trough and isprojected from its end trough through the slot I09 of the cylinder I03where it is held by the projections I08 on the pivoted fingers I01.

After the return of the plunger I9 to its initial position, the pistonof the cylinder 99 is moved downwardly to move the plunger I0|therewith.

The downward movement of the plunger carries the cylinder I03 alongtherewith until the shoulders I04 thereof rests upon the cap I05.Thereupon the downward movement of the cylinder I03 ceases, while theplunger continues to ad- Vance. This further advancement of the plungermoves the fingers I01 outwardly against the bias of the garter springIII and releases the rivet which is free to drop upon the jaws 89. Therivet is engaged by the end II3 of the plunger IM and forced through theaperture 93 of the jaws 89 Where it is retained through the bias of theplunger 92 on the jaws, as illustrated in Fig. 2.

, ing the rivet holding jaws, advances a rivet into Thereupon the flowof fluid in the cylinder 99 is reversed to have the piston and,therefore, plunger I9I moved upwardly. The upward movement of theplunger IOI produces the return of the cylinder I03 to its originalposition through the engagement of the end II3 of the plunger therewith.Thereupon a new rivet is delivered to the jaws, ready to be advancedadjacent to a new workpiece. It will be understood that, during theoperation of the elements of the device, the rotor 23 continues to bedriven sticking position while turning the jaws and rivets throughdegrees, The operation of the plunger within the cylinder of the rivetholding head, releases the rivet from the holdin fingers and forces therivet into the aperture of the jaws. The sequence of operation of theelements is effected by valves in a well-known manner and not hereinillustrated or described.

While I have described and illustrated but a single embodiment of myinvention, it will be apparent to those skilled in the art that variouschanges, omissions, additions and substitutions may be made thereinwithout departing from the spirit and scope of my invention, as setforth in the accompanying claims.

What I claim is:

1. In a rivet sticking device, a rivet supporting head, means fordelivering rivets seriatim to said head, a sleeve below said head, aplunger in said sleeve, a cylinder for advancing said plunger from saidsleeve, means interconnecting the sleeve and plunger to cause the sameto rotate through 180 degrees when moved relative to each other, a pairof spring-pressed jaws on the ends of said plunger aligned with saidhead, means in said head for advancing a rivet to said jaws and forthereafter releasing said rivet from said head and forcing the rivetbetween said jaws, and means for thereafter returning said supportinghead to its initial position.

2. In a rivet sticking device, a rivet supporting head, means fordelivering rivets seriatim. to said head, a sleeve below said head, aplunger in said sleeve, a cylinder for advancing said plunger from saidsleeve, means interconnecting the sleeve and plunger to cause the sameto rotate through 180 degrees when moved relative to each other, a pairof spring pressed jaws on the ends of said plunger aligned with saidhead, means in said head for advancing a rivet to said jaws and forthereafter releasing said rivet from said head and forcing the rivetbetween said jaws, means for thereafter returning said supporting headto its initial position, and means thereafter for advancing said jaws torivet sticking position.

3. In a rivet sticking device, a rivet supporting head, means fordelivering rivets seriatim to said head, a sleeve below said head, aplunger in said sleeve, a cylinder for advancing said plunger from saidsleeve, means interconnecting the sleeve and plunger to cause the sameto rotate through 180 degrees when moved relative to each other, a pairof spring-pressed jaws on the ends of said plunger aligned with saidhead, means in said head for advancing a rivet to said jaws and forthereafter releasing said rivet from said head and forcing the rivetbetween said jaws, means thereafter for returning said supporting headto its initial position, and means thereafter for advancing said jaws torivet sticking position, the reciprocation of said plunger producing theseriatim delivery of the rivets to said head.

OTTO MUELLER.

